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General Motors GM 8L90 transmission

The 8L is the first 8-speed automatic transmission built by General Motors. All 8L transmissions are based on the same globally patented gearset concept as the ZF 8HP from 2008 and, like this, are designed for longitudinal engine installation and features a hydraulic (Hydramatic) design. While fully retaining the same gearset logic, they differ only in the patented arrangement of the components, with planetary gearsets 1 and 3 swapped.

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